We claim the ornamental design for a food container, as shown and described.
FIG. 1 is a perspective view of a food container, showing our new design;
FIG. 2 is a bottom perspective view thereof;
FIG. 3 is a front elevational view thereof;
FIG. 4 is a rear elevational view thereof;
FIG. 5 is a right-side elevational view thereof;
FIG. 6 is a left-side elevational view thereof;
FIG. 7 is a top plan view thereof; and,
FIG. 8 is a bottom plan view thereof.
The broken lines showing a hand grasping the bottom of the food container in FIG. 2 depict environmental matter and form no part of the claimed design.